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Table 4 Rates of mortality in 5 different risk strata predicted by the XGBoost model in the external validation dataset (n = 1060)

From: A machine learning-based risk stratification tool for in-hospital mortality of intensive care unit patients with heart failure

Risk Stata

Predictive hospital-mortality risk (%)

Rate of total study population (%)

Hospital-mortality (%)

Very low

≤ 5

532 (50.2%)

3.2

Low

5–10

195 (34.3%)

5.6

Moderate

10–30

231 (21.8%)

19.5

High

30–50

61 (10.7%)

41.0

Very high

> 50

41 (7.2%)

53.7